A. Land: Notwithstanding any other provisions of this chapter, no use may be made of land in any of the zones described in section 12-3-3 of this chapter, in such a manner as to create electrical interference with radio communications between aircraft and ground stations, make it difficult for operators of aircraft to distinguish between lights on the airport intended for aid in landing or taking off thereat or in aerial navigation, and other lights, result in glare to the eyes of the operators of aircraft using the airport, impair visibility in any of such zones or otherwise make hazardous the landing or taking off of aircraft at the airport or the maneuvering of aircraft in connection with such landings or takeoffs; provided, however, that the mere height of trees or structures on any land in said zones conforming to the height restrictions prescribed in section 12-3-4 of this chapter shall not constitute a use of land in violation of this section.
B. Nonconforming Uses: The regulations prescribed in this chapter shall not be so construed as to require the removal, lowering, changing or altering of any nonconforming structure or tree nor as to otherwise interfere with any nonconforming use of land nor as to require any change in the construction, alteration or intended use of any structure, the construction or alteration of which was begun prior to the effective date of resolution 52-52 and which was diligently prosecuted and completed within one year from the date thereof; provided, however, that the owner of any nonconforming structure or tree is hereby required to permit the city and county, or either of them, at the expense of such city or county to install, operate and maintain thereon such markers and lights as shall be deemed by such city or county to be necessary to indicate to the operators of aircraft in the vicinity of the airport, the presence of such airport hazards. (Ord. 51-14, 8-4-2014)